Door-stop.



A. J. PREVOST.

- noon STOP. I APPLICATION FILED MAR. 24, 1910.

Patented Nov. 22, 1910.

WITNESSES certain new and ARTHUR J. PREVOST, OF ROCHESTER,

ED STATEilfTENT OFFICE.

NEW YORK, ASSIGNOR TO CALDWELL MANU- FACTURING COMPANY, OF ROCHESTER,NEW YORK, A

CORPORATION OF NEW YORK.

DOOR-STOP.

arenas.

Specification of Letters Patent.

Patented Nov. 22, 1910.

To all whom it may concern:

Be it known that I, ARTHUR J. PREvosT, a subject of the King of GreatBritain, and resident of Rochester, in the county of Monroe and State ofNew York, have invented useful Improvements in Door-Stops, of which thefollowing is a specification.

This invention relates to door stops of the type in which a plunger ismounted to slide vertically in a casing fixed to'the side of a door nearthe bottom thereof, the plunger being pressed into contact with thefloor when the door is to be held in open position.

The object of the invention is to improve door stops of the type abovereferred to with respect to the means by which the casing is fixed tothe door, and to this end I employ, at the lower end of the casing, afastening device comprising a socket member inclosing the lower end ofthe casing and provided with a lug' extending upwardly behind thesecured to the door casing, this lug being by means of a screw or othersuitable means.

By this arrangement the lower end of the casing is securely held, whilethe appearance of the device is neat and simple, the screw beingconcealed behind the casing.

The preferred embodiment of my invention is illustrated in theaccompanying drawings, in which- Figure 1 is a Vertical median sectionof a door stop embodying the present invention, in place on a door andin operative engagement with the floor, the plunger being shown in full;Fig. 2 is a front elevation of the door stop of Fig. 1; Fig. 3 is a rearelevation of the lower portion of the door stop with the plunger inoperative position; and Fig. 4 is a perspective View of the device forsecuring the lower end of the casing.

The illustrated embodiment of my invention is provided with a plungercomprising a shank 1 and a head 2 of larger diameter than the shankfixed to the lower end there of. The plunger is arranged to slidevertically in a casing 3 which is secured to the surface 'of the door.The casing is of semicylindrical form at the front, and has twosubstantially parallel sides, while it is open at the back. The upperend of the casing is closed, and is perforated to provide a bearing forthe shank of the plunger. The lower end of the casing is provided with abearing for the head 2 of the plunger.

The casing is secured to the door at its upper end by means of anupwardly-extending lug 4 which is perforated to receive a screw 5 fixedin the door 6. The lower end of the casing is reduced at 7 (Figs. 1 and3) and is seated in an upwardly-opening socket in a socket member 8,this member having the same form in horizontal cross-section as thecasing. The socket member completely incloses the lower end of thecasing, and the outer surface of this member is flush with the generalsurface of the casing, so that, as shown in Fig. 2, the socket memberis, in appearance, a continuation or portion of the casing, except forthe horizontal line of juncture between the socket member and thecasing.

The socket member is fixed to the door by means of an upwardly-extendinglug 9 which is perforated to receive a screw 10 fixed in the door. Thelug 9 is narrower than the socket member, so that it enters the spacebetween the parallel sides of the casing. The lug is, therefore,entirely concealed within the casing, and the securing device as a wholehas a very neat appearance while at the same time securing the casingabsolutely against movement in all directions.

When the door stop is in use the plunger is forced downward by theapplication of pressure against its upper end so as to bring its lowerextremity into engagement with the floor, and to increase its frictionalhold upon the floor a rubber plug 11 is inserted in the lower end of thehead 2. The plunger is held in its depressed position by means of apinch-plate 12. The pinch-plate has a lug 13 which enters a slot in thelug 4: on the casing. The plunger shank 1 passes through an opening inthe pinch-plate which embraces the shank closely but loosely. Acompression spring 14 is inserted between the pinch-plate and the upperend of the casing. The spring 14 causes the pinchplate to bind againstthe shank of the plunger, owing to the rocking of the pinch-plate aboutits point of engagement with the lug 4. When the pinch-plate isdepressed, however, by the application of pressure against its outerextremity, the shank may move freely through the pinch-plate.

To raise the plunger into inoperative position when the pinch-plate isdepressed to release the plunger a compression spring 15, surroundingthe shank 1, is employed. This spring rests at its lower end upon ahorizontal lug 16 formed within the casing and surroundlng the plunger.The upper end of the spring engages a pin 17 fixed in the plunger.

When the the plunger released the spring 15 throws the plun erupwardwith considerable force, and the lug 16 acts as a stop to arrest theplunger in upward position. the noise and in combination, a

pinch-plate is depressed and ing a socket member inclosing the end ofthe casing and having a lug extending upward behind the casing andadapted to be secured to the door.

2. A door stop having, plunger, a casing in which the plunger slides,the casing being open at the rear and having a reduced lower end, meansfor securing the upper end of the casing to a door, and means forsecuring the lower end of the door comprising a socket member inclosingthe reduced end of the casing and substantially flush with the generalsurface of the casing and a lug extending upward from the socket betweenthe casing and adapted to be secured to the door.

ARTHUR J. PREVOST.

Witnesses:

C. W. CARROLL, D. GURNEE.

in combination, a

the casing to sides of the

